UCD90320
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ZHCSFI3B –AUGUST 2016–REVISED MAY 2019
Figure 33. Fusion Digital Power Designer software Logged Faults(Status ►Logged Faults tab)
8.4.13 Data and Error Logging to EEPROM Memory
The UCD90320 provides fault log, device reset counter, and peak readings for each rail. To reduce stress on the
EEPROM memory, a 30-second timer is started if a measured value exceeds the previously logged value. Only
the highest value from the 30-second interval is written from RAM to EEPROM.
Faults are stored in EEPROM memory and are accessible over PMBus. Each logged fault includes the following
information:
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•
•
•
Rail number
Fault type
Fault time since previous device reset
Last measured rail voltage
The total number of device resets is also stored to EEPROM memory. The value can be reset using PMBus.
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